Stuck between a rock and a hard place?

I'm 16 and I'm trying to get a job for the summer so I can pay for gas in my car because my parents can't pay for it forever. However, my mom is going to college right now and she doesn't have time to do anything around the house so she depends on me to do it and if I get a job then I can't do the stuff around the house. My parents pay for my insurance too so that's sort of like my allowance so i don't get money at all. I'm in a few things at school that continue through the summer so a part time is my only option and it takes up the rest of my time. WHAT SHOULD I DO!!!!?